Process of producing sodium hydrosulfid.



UNITED STATES PATENT OFFICE.

WILHELM HASENBAOH, OF MANNHEIM, GERMANY.

PROCESS OF PRODUCING SODIUM HYDROSUIFH).

Specification of Letters Patent.

Patented Nov. 3, 1908.

Original application filed November 1, 1907; Serial No. 400,207. Divided and this application filed March 10, 1908.

. Serial No. 420,203.

To all whom it concern:

Be it known that I, WILHELM HASENBAOH,

. a subject of the German Emperor, and residmg at Mannheim, Germany, have invented certain new and useful Improvements in Processes of Producing Sodium Hydrosulfid, of which thefollowing 1s a specification.

This invention consists of a process of manufacturing solid pulverulent sodium-hydrosulfid free from water.

' The process consists in passing sulfureted hydrogen free from oxygen (such for instance as has'been obtained by the process which is the object of anotherapplication for U. S. Letters Patent filed of even date herewith, Serial N 0. 420,204) at a high tem erature (preferably at a temperature of a out 300 centigrade) over solid pulverulent sodium sulfid. The sulfureted h drogen is' thereby absorbed and a pulveru ent hydrosulfid free from water is obtained. Sulfureted hydrogen is also taken up by solid pulveru ent sodium sulfid at a lower temperature but it is not then possible to obtain a complete conversion of the solid pulverulent sodiumsulfid into hydrosulfid. If the tem erature exceeds essentially 300 centigrade t e reaction product melts.

If the sulfureted hydrogen used contains carbon dioxid the in'urious action of this gas on the reaction pro uct can be obviated b mixing the finely ground sodium sulfid with as much pulverulent caustic lime as corresponds to the amount of carbonic acid in the sulfureted hydrogen used. A dry, easily friable roduct is thus obtained which contains a igh percentage of sodium-hydrosulfid free from water.

The product above described can inmany cases be freed from its im urities, whic chiefly consist of finely divi ed coal, at the place Where it is to be used. As the product is obtained in a solid form it can be transported much more readily and cheaply than can the liquid products obtained by the processes heretofore commonly employed.

Having thus described the invention what is claimed is 1. The herein described process of making solid pulverulent sodium hydrosulfid free from water which consists in passing sulfureted hydrogen gas free from oxygen at atemperature of approximately 300 C. over finely pulverized anhydrous sodium sulfid.

2. The herein described process of making solid pulverulent sodium hydrosulfid free from water which consists in passing sulfureted hydrogen gas containing carbon dioxid at a temperature of approximately 300 C. over finely pulverized anhydrous sodium sulfid mixed with as much pulverized caustic lime as is required to combine with the carbon dioxid contained in the sulfureted hydrogen.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILHELM HASENBACH.

Witnesses:

ALBERT SomJLn, Jos. H. LEUTE. 

